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A convenient access to new phosphine and diphosphine ligands from phosphinic acids

✍ Scribed by Eric Soulier; Jean-Claude Cle´ment; Jean-Jacques Yaouanc; Herve´des Abbayes

Publisher
Elsevier Science
Year
1998
Tongue
French
Weight
180 KB
Volume
39
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

Phosphinic acids are convenient starting materials for a two-steps route to a large variety ofphosphines and polyphosphines.

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Reduction of phosphinic acids (I) with phenylsilane or of the corresponding diacids (V) with LiAlH 4 provides phosphines (II) or diphosphines (III) via their acid chlorides. They may be used in Michael additions with the activated alkene (V) or in most cases as stable borane adducts such as (VII) an

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or~bo-and pnra-phosphinophenyl derivatives of glycine and alanine have been synthesised by nucleophilic phosphination of Z-and 4-fluorophenylglycine and -alanine with Ph(R)PK (R = Me, Ph) The structure of 2-diphenylphosphino-a-phenylglycine has been identified by X-ray analysis